Research on over-voltage characteristics of ultra high-voltage direct current transmission system

被引：5

作者：

Li, Yingjin ^{[1
]}

Cui, Jian ^{[2
]}

Yang, Ran ^{[2
]}

Huang, Ping ^{[1
]}

Chen, Bo ^{[1
]}

Wang, Junfei ^{[1
]}

Gan, Zhizheng ^{[2
]}

机构：

[1] Shandong Elect Power Engn Consulting Inst Co Ltd, Jinan 250013, Peoples R China

[2] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

来源：

ENERGY REPORTS | 2022年 / 8卷

关键词：

Electromagnetic transient simulation; Ultra high-voltage power transmission; Load dump; Overvoltage; Insulation coordination;

D O I：

10.1016/j.egyr.2022.02.035

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Load dumping overvoltage has a significant effect on insulation coordination of direct current (DC) transmission system. Based on the PSCAD/EMTDC electromagnetic transient simulation programs, this paper has built the electromagnetic transient calculation model of ultra high-voltage direct current (UHVDC) transmission system. Respectively, we have done comparative research on the overvoltage during load dumping under three rated-load operations, which are the bipolar operation with ground return, unipolar operation with metal return, unipolar operation with ground return, concluding that alternating current (AC) load dumping on the inverter side under these three operations can result in overvoltage no less than 50% on the DC polar line, DC valve top, as well as both ends of the converter transformer valve and the upper six pulses bridge also produce a large overvoltage. Besides, we observed a similar overvoltage level between unipolar ground return operation and unipolar metal return operation. These conclusions can provide suggestions for insulation coordination in various operations. (C) 2022 The Authors. Published by Elsevier Ltd.

引用

页码：804 / 811

页数：8

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